diff --git a/mypy/fscache.py b/mypy/fscache.py
index c77b941c551ca..ea71577b5f86d 100644
--- a/mypy/fscache.py
+++ b/mypy/fscache.py
@@ -30,7 +30,6 @@
 
 import os
 import stat
-import sys
 from typing import Dict, List, Set
 from mypy.util import hash_digest
 from mypy_extensions import mypyc_attr
@@ -202,9 +201,6 @@ def isfile_case(self, path: str, prefix: str) -> bool:
 
         The caller must ensure that prefix is a valid file system prefix of path.
         """
-        if sys.platform == "linux":
-            # Assume that the file system on Linux is case sensitive
-            return self.isfile(path)
         if not self.isfile(path):
             # Fast path
             return False